I believe almost all of the weapons used in the incidents provided started out their lives as legally owned and purchased. Is that correct?
So I had a little bit of time on my hands today and I figured that I'd go back and check how my memory fared regards these cases and some research I did just after the Lindt Siege for work purposes. Here's what I found:
1 - The Monash University shootings - the shooter was licensed to hold the weapons he used to commit the murders -
https://web.archive.org/web/2004091...ews/politics/2002/10/item20021023002157_1.htm
2 - Hectorville - weapon was legally owned before being taken and used by the killer -
http://www.adelaidenow.com.au/news/...s/news-story/7d8cd40d20bbb2fd7773934ef7109335
3 - Hunt family shootings - unable to find any information on the legality of the weapon and licensing of the murderer
Because of the above two grey areas I looked for another incident around the same era with similar circumstances and I found the Wedderburn shootings
4 - Wedderburn shootings - the weapon was legally owned, the killer was licensed to hold such weapon -
http://www.abc.net.au/news/2014-10-...amily-make-emotional-gun-control-plea/5838614
5 - Lindt Siege - Monis was not licensed to carry a firearm after 2000 (prior to that he was licensed). The bullets he used were between 15 - 20 years old and the shotgun he used was over 50 years old and untraceable. The Coroner's report stated that the weapon may well have been imported into Australia legally and entered the grey market when not handed back during the buy-back scheme (have to note that it may well have been imported illegally, impossible to tell)
https://www.pmc.gov.au/sites/default/files/publications/170215_Martin_Place_Siege_Review_1.pdf
6 - Port Arthur massacre - Bryant purchased the weapon from a legal owner of the firearm. He was supposed to show a license for purchase but claims that he did not -
https://au.news.yahoo.com/sunday-night/a/31076116/bryant-port-arthur-wouldnt-have-happened/
Conclusions:
1 case inconclusive out of lack of evidence based on internet searches.
1 case is inconclusive with the type of firearm in question previously legal
4 cases show a situation where the gun was legally owned prior to being used illegally
4 of the cases show a person that was previously a 'law abiding' person - these are people who have no criminal record for violent acts, theft, robbery or anything that I could uncover - became criminals by their act of carrying out a mass shooting. Some of them are noted for being model citizens like the killer in the Hunt family murders. Man Monis was a known criminal under numerous investigations. In one case the gun owner was a law abiding citizen and were found to have stored their weapons legally.
Outcomes:
Using this small amount of cases, based on the suggestion of an anti-gun control advocate, it can be shown that in the majority of cases the firearms used in mass killings including and since Port Arthur were originally 'legal' - that is purchased and owned legally by a licensed or legal owner.
Secondly, this small sample shows that people who are otherwise law abiding citizens only become criminals by way of carrying out mass shootings. That would suggest that to argue law abiding citizens are punished for the acts of a few criminals is erroneous given that those few criminals were law abiding citizens up until the very moment they carried out a mass shooting. This suggests that law abiding citizens can be just as risky and dangerous to the general society when armed as a known criminal.
And finally, it suggests that my original question was not based on any bias but on an accurate memory based on prior research. This would then suggest that there is room for the argument that the disproportionate and overwhelming response to my question was, in actual fact, an indication of strong bias or an absolute misreading of my intention based on the lack of tone in written text. This is even more interesting given that the disproportionate response to my question was prefaced with a claim of respect given that the following words would be forceful and may be misread due to the lack of tone in text.